<template>
  <div class="app-container">
    <el-form :model="queryParams" ref="queryRef" :inline="true" v-show="showSearch" label-width="68px">
      <!-- 新增：分类名称 -->
      <el-form-item label="分类名称" prop="categoryId">
        <el-cascader
          v-model="queryParams.categoryId"
          :options="categoryOptions"
          :props="{ value: 'id', label: 'categoryName', children: 'children', checkStrictly: true }"
          clearable
          style="width: 100%;"
        />
      </el-form-item>

      <el-form-item label="商品名称" prop="productName">
        <el-input
          v-model="queryParams.productName"
          placeholder="请输入商品名称"
          clearable
          @keyup.enter="handleQuery"
        />
      </el-form-item>
      <el-form-item label="售价" prop="productPrice">
        <el-input
          v-model="queryParams.productPrice"
          placeholder="请输入售价"
          clearable
          @keyup.enter="handleQuery"
        />
      </el-form-item>
      <el-form-item label="虚拟销量" prop="productSales">
        <el-input
          v-model="queryParams.productSales"
          placeholder="请输入虚拟销量"
          clearable
          @keyup.enter="handleQuery"
        />
      </el-form-item>
      <el-form-item>
        <el-button type="primary" icon="Search" @click="handleQuery">搜索</el-button>
        <el-button icon="Refresh" @click="resetQuery">重置</el-button>
      </el-form-item>
    </el-form>

    <el-row :gutter="10" class="mb8">
      <el-col :span="1.5">
        <el-button
          type="primary"
          plain
          icon="Plus"
          @click="handleAdd"
          v-hasPermi="['mail:product:add']"
        >新增</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="success"
          plain
          icon="Edit"
          :disabled="single"
          @click="handleUpdate"
          v-hasPermi="['mail:product:edit']"
        >修改</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="danger"
          plain
          icon="Delete"
          :disabled="multiple"
          @click="handleDelete"
          v-hasPermi="['mail:product:remove']"
        >删除</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="warning"
          plain
          icon="Download"
          @click="handleExport"
          v-hasPermi="['mail:product:export']"
        >导出</el-button>
      </el-col>
      <right-toolbar v-model:showSearch="showSearch" @queryTable="getList"></right-toolbar>
    </el-row>

    <el-table v-loading="loading" :data="productList" @selection-change="handleSelectionChange">
      <el-table-column type="selection" width="55" align="center" />
      <el-table-column label="ID" align="center" prop="id" />
      <!-- 新增：分类名称列 -->
      <el-table-column label="分类名称" align="center" prop="categoryName" />
      <el-table-column label="商品名称" align="center" prop="productName" />
      <el-table-column label="封面图" align="center" prop="productImage" width="100">
        <template #default="scope">
          <image-preview :src="scope.row.productImage" :width="50" :height="50"/>
        </template>
      </el-table-column>
      <el-table-column label="商品售价" align="center" prop="productPrice" />
      <el-table-column label="虚拟销量" align="center" prop="productSales" />
      <el-table-column label="状态" align="center" prop="productStatus" />
      <el-table-column label="操作" align="center" class-name="small-padding fixed-width">
        <template #default="scope">
          <el-button link type="primary" icon="Edit" @click="handleUpdate(scope.row)" v-hasPermi="['mail:product:edit']">修改</el-button>
          <el-button link type="primary" icon="Delete" @click="handleDelete(scope.row)" v-hasPermi="['mail:product:remove']">删除</el-button>
        </template>
      </el-table-column>
    </el-table>

    <pagination
      v-show="total>0"
      :total="total"
      v-model:page="queryParams.pageNum"
      v-model:limit="queryParams.pageSize"
      @pagination="getList"
    />

    <!-- 添加或修改商品对话框 -->
    <el-dialog :title="title" v-model="open" width="500px" append-to-body>
      <el-form ref="productRef" :model="form" :rules="rules" label-width="80px">
        <!-- 新增：父类名称 -->
        <el-form-item label="分类名称" prop="categoryId">
          <el-cascader
            v-model="form.categoryId"
            :options="categoryOptions"
            :props="{ value: 'id', label: 'categoryName', children: 'children', checkStrictly: true }"
            @change="handleCascaderChange"
            clearable
            style="width: 100%;"
          />
        </el-form-item>

        <el-form-item label="商品名称" prop="productName">
          <el-input v-model="form.productName" placeholder="请输入商品名称" />
        </el-form-item>
        <el-form-item label="封面图" prop="productImage">
          <image-upload v-model="form.productImage"/>
        </el-form-item>
        <el-form-item label="售价" prop="productPrice">
          <el-input v-model="form.productPrice" placeholder="请输入售价" />
        </el-form-item>
        <el-form-item label="销量" prop="productSales">
          <el-input v-model="form.productSales" placeholder="请输入销量" />
        </el-form-item>
      </el-form>
      <template #footer>
        <div class="dialog-footer">
          <el-button type="primary" @click="submitForm">确 定</el-button>
          <el-button @click="cancel">取 消</el-button>
        </div>
      </template>
    </el-dialog>
  </div>
</template>

<script setup name="Product">
import { listProduct, getProduct, delProduct, addProduct, updateProduct } from "@/api/mail/product";
import { listCategory } from "@/api/mail/category"; // 引入分类接口

const { proxy } = getCurrentInstance();

const productList = ref([]);
const open = ref(false);
const loading = ref(true);
const showSearch = ref(true);
const ids = ref([]);
const single = ref(true);
const multiple = ref(true);
const total = ref(0);
const title = ref("");
const categoryOptions = ref([]); // 分类选项

const data = reactive({
  form: {},
  queryParams: {
    pageNum: 1,
    pageSize: 10,
    productName: null,
    productImage: null,
    productPrice: null,
    productSales: null,
    productStatus: null,
    categoryId: null // 新增：用于存储分类ID
  },
  rules: {}
});

const { queryParams, form, rules } = toRefs(data);

// 新增：获取分类选项
function loadCategoryOptions() {
  listCategory({}).then(response => {
    categoryOptions.value = response.rows.map(category => ({
      id: category.id,
      categoryName: category.categoryName,
      children: buildChildren(category)
    }));
  });
}

// 新增：递归构建子分类
function buildChildren(category) {
  if (!category.children || !category.children.length) return [];
  return category.children.map(child => ({
    id: child.id,
    categoryName: child.categoryName,
    children: buildChildren(child)
  }));
}

/** 查询商品列表 */
function getList() {
  loading.value = true;
  listProduct(queryParams.value).then(response => {
    productList.value = response.rows;
    total.value = response.total;
    loading.value = false;
  });
}

// 取消按钮
function cancel() {
  open.value = false;
  reset();
}

// 表单重置
function reset() {
  form.value = {
    id: null,
    productDetailId: null,
    categoryId: null, // 新增：初始化分类ID
    productStockId: null,
    productName: null,
    productImage: null,
    productPrice: null,
    productSales: null,
    productStatus: null,
    createBy: null,
    createTime: null,
    updateBy: null,
    updateTime: null
  };
  proxy.resetForm("productRef");
}

/** 搜索按钮操作 */
function handleQuery() {
  queryParams.value.pageNum = 1;
  getList();
}

/** 重置按钮操作 */
function resetQuery() {
  proxy.resetForm("queryRef");
  handleQuery();
}

// 多选框选中数据
function handleSelectionChange(selection) {
  ids.value = selection.map(item => item.id);
  single.value = selection.length !== 1;
  multiple.value = !selection.length;
}

/** 新增按钮操作 */
function handleAdd() {
  reset();
  open.value = true;
  title.value = "添加商品";
}

/** 修改按钮操作 */
function handleUpdate(row) {
  reset();
  const _id = row.id || ids.value;
  getProduct(_id).then(response => {
    form.value = response.data;

    // 同步设置 cascader 的选中路径
    if (form.value.categoryId) {
      const fullPath = buildCascaderPath(categoryOptions.value, form.value.categoryId);
      queryParams.value.categoryId = fullPath || [];
    }

    open.value = true;
    title.value = "修改商品";
  });
}

/** 提交按钮 */
function submitForm() {
  proxy.$refs["productRef"].validate(valid => {
    if (valid) {
      if (form.value.id != null) {
        updateProduct(form.value).then(response => {
          proxy.$modal.msgSuccess("修改成功");
          open.value = false;
          getList();
        });
      } else {
        addProduct(form.value).then(response => {
          proxy.$modal.msgSuccess("新增成功");
          open.value = false;
          getList();
        });
      }
    }
  });
}

// 新增：处理 cascader 选择变化
function handleCascaderChange(value) {
  if (value && value.length > 0) {
    form.value.categoryId = value[value.length - 1]; // 获取选中节点的 id
  } else {
    form.value.categoryId = null;
  }
}

// 新增：递归查找 parentId 对应的完整级联路径
function buildCascaderPath(options, targetId, path = []) {
  for (let i = 0; i < options.length; i++) {
    const node = options[i];
    const currentPath = [...path, node.id];

    if (node.id === targetId) {
      return currentPath;
    }

    if (node.children && node.children.length > 0) {
      const result = buildCascaderPath(node.children, targetId, currentPath);
      if (result) return result;
    }
  }
  return null;
}

// 删除按钮操作
function handleDelete(row) {
  const _ids = row.id || ids.value;
  proxy.$modal.confirm('是否确认删除商品编号为"' + _ids + '"的数据项？').then(function () {
    return delProduct(_ids);
  }).then(() => {
    getList();
    proxy.$modal.msgSuccess("删除成功");
  }).catch(() => {});
}

// 导出按钮操作
function handleExport() {
  proxy.download('mail/product/export', {
    ...queryParams.value
  }, `product_${new Date().getTime()}.xlsx`);
}

getList();
loadCategoryOptions(); // 新增：页面加载时初始化分类选项
</script>
